استفاده از جاذب کامپوزیتی تهیه شده از لجن نفتی و پسماند لیگنوسلولزی برای حذف فورفورال از محلول‌های آبی: مقایسه روش کربونیزاسیون و فعال سازی

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان، اصفهان، ایران

چکیده

افزایش روزافزون پسماندها و مدیریت آن‌ها به عنوان یک معضل زیست‌محیطی و اقتصادی مهم در نظر گرفته می­شود. در این مطالعه، لجن نفتی پالایشگاه نفت و پسماند لیگنوسلولزی ناشی از هرس درخت نارون به عنوان مواد اولیه در تهیه جاذب­های کامپوزیتی استفاده شدند. جاذب­های کامپوزیتی با استفاده از کربونیزاسیون در دمای ˚C 500 و فعال­سازی شیمیایی به وسیله کلرید روی در دمای ˚C 800 تهیه گردید و کارایی آن‌ها برای حذف فورفورال از محلول‌های آبی بررسی شد. نتایج حاصل از آنالیز­های جذب فورفورال، BET، SEM و FTIR نشان داد به علت تشکیل ساختار­های حاوی میکروپور و مزوپور، کامپوزیت فعال­شده دارای سطح ویژه و راندمان قابل ملاحظه­ بیشتری در مقایسه با کامپوزیت کربونیزه شده است. سطح ویژه برای کامپوزیت کربونیزه و فعال­شده به ترتیب 53/3 و  m2/g7/691، و درصد جذب فورفورال 3/10و 7/96% به دست آمد. بر این اساس، جاذب کامپوزیتی فعال­شده می­تواند به عنوان جایگزینی برای کربن فعال تجاری در تصفیه فاضلاب استفاده شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Use of Composite Adsorbent Prepared from Oily Sludge and Lignocellulosic Waste for Removal of Furfural from Aqueous Solutions: Comparison of Carbonization and Activation Methods

نویسندگان [English]

  • samaneh mahzoonieh
  • Nourollah Mirghaffari
  • Mohsen Soleimani
Department of Natural Resources, Isfahan University of Technology, Isfahan, Iran
چکیده [English]

The increase of wastes and their management are considered as an important environmental and economic problem. In this study, the oily sludge of oil refinery and lignocellulosic waste from elm tree were used as raw materials for preparation of composite adsorbents. Composite adsorbents were prepared using carbonization at 500 ˚C and chemical activation by zinc chloride at 800 ˚C and their efficiency for removal of furfural from aqueous solutions were investigated. Results of furfural adsorption, BET, SEM and FTIR analysis showed that the activated composite, due to formation of micropore and mesopore structures, has  a more higher specific surface area and efficiency, as compared with carbonized composite. The BET of carbonized and activated composite was 3.53 and 691.7 m­­2/g and the percentage of furfural adsorption was 10.3 and 96.7%, respectively. Based on the obtained results, the activated composite adsorbent can be used as an alternative of commercial activated carbon for wastewater treatment.

کلیدواژه‌ها [English]

  • Oily pollution
  • waste management
  • Adsorption
  • water pollution
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